Trailer logging bunk



Jun 5, 1945. C;t R, SHUEY 2,377,723

\ TRAILER LOGGINGBUNK l Filed March 2o, 1942 2 sheets-sheet 1 Inventor.22 C'arl'es 7B. SI1/wey TRAILER LOGGING BUNK Patented June 5, 1945UNITED STATES PATE g y TRAILERLOGGING BUNK Charles R. Shuey, Spokane,Wash.

Application March-2o, 1942-, serial No. 435,589

1 Claim.

My invention relates to trailer logging bunks of the type forming thesubject matter of my U. S. Letters Patent No. 2,255,863, dated September16, 1941, and more particularly to improvements in axle mountings forsuch bunks.

The principal object of the invention is to provide an axle mountingadapted to reduce vibration and thereby prolong the life of the trailerbunk and reduce wear on the tires.

Other and subordinate objects are also comprehended by my invention, allof which, together with the precise nature of my improvements, will bereadily understood when the suc-v ceeding description and claim are readwith reference to the drawings accompanying and forming part of thisspecication.

In said drawings:

Figure 1 is a view in bottom plan illustrating a trailer logging bunkembodying my improved axle mountings,

Figure 2 is a View in side elevation, with the axle shown in section,

Figure 3 is a fragmentary view in longitudinal vertical section taken onthe line 3--3 of Figure 1 and drawn to an enlarged scale,

Figure 4 is a View in vertical transverse taken on the line 4-4 ofFigure 2,

Figure 5 is a View in perspective of one of the brackets, and

Figure 6 is a fragmentary View in plan of one of the axle anchoringrods.

Referring to the drawings by numerals, the trailer logging bunk withwhich my improvesection V iments are more particularly concernedincludes a pair of spaced parallel axles 5 equipped at their ends withdual rubber tired wheels` 6. The` axles 5 areanchored, in a mannerpresently described,

to a `pair of longitudinally extending side frame members 1 of channelform in cross-section arranged with open Sides lowermost. Anintermediate transversely extending rock shaft 8 is journaled at itsends in a pair of sleeves 9 xed on the frame members 1 and a pluralityof upstanding supporting members I Il having their lower ends xed to theshaft 8 support at their upper ends a transversely extending bolsterplatform II. Above the platform II is a bolster I 2 resting on a base I3from which a pin I4,V not shown. projects for rotatably mounting thebolster I2. A pair of arms I6 xed at one end to the axles 5,respectively, and pivotally connected, as at I 6', to crank arms I1swingably mounted on the rock shaft 8 limits rocking movement of saidshaft.

At the ends thereof, the side frame members 1 are equipped with shockabsorbers for mounting said members on the axles 5. Each shock absorberincludes a cylindrical spring housing I9 and a coil spring 20 extendingout of the bottom of the housing and seated `upon a thrust plate 2 Ihaving a central bottom socket 2I' therein of arcuate concavity. A bolt21 extends vertically i 3, the bolt 21 extends through the top of thehousing I9 with a clearance, the spring 20 clears said housing, and thehead 21 of said bolt is arranged to fulcrum in the upper clip member 28so that the bolt` 21 can swing laterally without binding.

Coming now to my improvements, each axle 5 is provided with a pair ofbearings directly beneath the bolts 21 and each comprising a pair ofupper and lower clip members 28, 29 bolted together by a pair of uprightbolts 29' extending through lateral lugs 30 on the members. The upperclip member 28 isformed with arounded bearing 28 seating in the socket2|' of the plate 2l and forming with said socket a ball and socket jointand said clip member is bored `centrally to receive the bolt 21 so thatthe head of the bolt rests on the axle. Each bearing is connected to theside frame member 1 on the same side of the structure as the bearing andby the following means: A bracket plate 32 depends from the side framemember 1, said plate' being welded, as at 33, in said member and being`provided with an aperture 34 in its lower end. A rod 35 is pivoted atone `end on one bolt 29' of the bearing between the lugs 30 throughwhich said bolt extends and for lateral swinging on said bolt. The otherend of the rod 35 is slidably and pivotally extended through theaperture 34 in the bracket plate 32. A pair of heavy, centrallyapertured bumper blocks 3B are sleeved onto the rod 35 upon oppositesides of the bracket plate 32, respectively, and clamped against theplate by a pair of nuts 31 threaded onto said rod. As will beunderstood. the aperture 34 'in the bracket 'plate 32 provides forfulcruming action of the rod 35 therein vertically and laterally.

As will now be seen, the described mounting provides for vertica1 oatingmovement of the` axle 5 relative tothe side frame member `1 and NT-;OF-Flc 35 acting to thrust, or pulLthe nuts 31 against the bumperblocks 36, respectively, according to the direction in which the axles 5move laterally, the described ball and socket joint between the frontplate 2l and the upper clip member 23 obviating binding between saidplate and, clip and between said plate and the rod 2|.

The foregoing will, it is believed, suiiice to impart a clearunderstanding of my invention without further explanation.

Manifestlm tlie` invention, as' described, is susceptible of modicationwithout departing from the inventive concept, and right is hereinreserved to such modifications as fall within thev scope ofthe subjoinedclaim. y WhatIclaimis: i

In a trailer logging bunk including' a side'f'rarne member, a subjacentaxle, means. for mountingl the frame member on the axle andy permittingI afpair of resilient apertured bumper blocks sleeved onto said rod uponopposite sides of said bracket plate, and' nuts threaded onto said rodand clamping the blocks" against said bracket plate.

CHARLES R. SHUEY.

